Alert archive / North Carolina / Frost Advisories in 2011

Frost Advisory 6, NWS Greenville-Spartanburg, SC

May 4, 201114 counties in North Carolina; Rabun County, Georgia

NWS Greenville-Spartanburg, SC issued this frost advisory at May 4, 2011, 4:17 AM EDT for 14 counties in North Carolina; Rabun County, Georgia. It took effect at May 5, 2011, 2:00 AM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
May 4, 2011, 4:17 AM EDT (08:17 UTC)
In effect from
May 5, 2011, 2:00 AM EDT
Expired
May 5, 2011, 9:00 AM EDT
In force
7 hr
Issued by
NWS Greenville-Spartanburg, SC

Counties Rabun County, GA, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC

The radar

The Greer radar (KGSP), 76 km from the middle of the area, began a volume at 08:17 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 8.3 hours before the alert went out and 260 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 00:00Z on 2011-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 743 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 00:00Z on 2011-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 152 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
743 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1145 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
152 m²/s²
0-3 km storm-relative helicity
185 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

057 
WWUS72 KGSP 040817
NPWGSP

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
417 AM EDT WED MAY 4 2011

...CHILLY AIRMASS TO OVERSPREAD THE MOUNTAINS...

.COOL HIGH PRESSURE WILL BUILD INTO THE REGION TONIGHT GIVING RISE
TO A LIGHT ACROSS PARTS OF THE NORTH CAROLINA MOUNTAINS.

NCZ033-049-050-042000-
/O.UPG.KGSP.FZ.A.0003.110505T0600Z-110505T1300Z/
/O.NEW.KGSP.FZ.W.0006.110505T0600Z-110505T1300Z/
AVERY-YANCEY-MITCHELL-
INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE
417 AM EDT WED MAY 4 2011

...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM EDT THURSDAY...

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED
A FREEZE WARNING...WHICH IS IN EFFECT FROM 2 AM TO 9 AM EDT
THURSDAY. THE FREEZE WATCH IS NO LONGER IN EFFECT. 

* LOCATIONS...THE NORTHERN MOUNTAINS OF NORTH CAROLINA.

* TEMPERATURES...IN THE UPPER 20S TO LOWER 30S.

* IMPACTS...FREEZE DAMAGE TO SENSITIVE VEGETATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$

GAZ010-NCZ048-051>053-058-059-062>065-501-503-505-507-509-042000-
/O.NEW.KGSP.FR.Y.0006.110505T0600Z-110505T1300Z/
RABUN-MADISON-SWAIN-HAYWOOD-BUNCOMBE-GRAHAM-NORTHERN JACKSON-
MACON-SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON-CALDWELL MOUNTAINS-
BURKE MOUNTAINS-MCDOWELL MOUNTAINS-RUTHERFORD MOUNTAINS-
POLK MOUNTAINS-
INCLUDING THE CITIES OF...CLAYTON...BRYSON CITY...WAYNESVILLE...
ASHEVILLE...SYLVA...FRANKLIN...BREVARD...HENDERSONVILLE
417 AM EDT WED MAY 4 2011

...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT THURSDAY...

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED
A FROST ADVISORY...WHICH IS IN EFFECT FROM 2 AM TO 9 AM EDT
THURSDAY. 

* LOCATIONS...THE CENTRAL AND SOUTHERN MOUNTAINS OF NORTH CAROLINA
  AND RABUN COUNTY GEORGIA.

* TEMPERATURES...IN THE MID 30S.

* WINDS...NORTH 5 TO 10 MPH DIMINISHING TO NEAR CALM.

* IMPACTS...FROST DAMAGE TO SENSITIVE VEGETATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$
5 follow-up statements
023 
WWUS72 KGSP 041811
NPWGSP

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
211 PM EDT WED MAY 4 2011

...CHILLY AIRMASS TO OVERSPREAD THE MOUNTAINS...

.COOL HIGH PRESSURE WILL BUILD INTO THE REGION TONIGHT ALLOWING
FOR DIMINISHING WINDS AND CHILLY TEMPERATURES IN THE NORTH
CAROLINA MOUNTAINS.

NCZ051-052-059-062-063-051300-
/O.UPG.KGSP.FR.Y.0006.110505T0600Z-110505T1300Z/
/O.EXA.KGSP.FZ.W.0006.110505T0600Z-110505T1300Z/
SWAIN-HAYWOOD-NORTHERN JACKSON-MACON-SOUTHERN JACKSON-
INCLUDING THE CITIES OF...BRYSON CITY...WAYNESVILLE...SYLVA...
FRANKLIN
211 PM EDT WED MAY 4 2011

...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM EDT THURSDAY...

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED
A FREEZE WARNING...WHICH IS IN EFFECT FROM 2 AM TO 9 AM EDT
THURSDAY. 

* LOCATIONS...SOUTHWEST MOUNTAINS IN WESTERN NORTH CAROLINA

* TEMPERATURES...IN THE UPPER 20S TO LOWER 30S.

*FREEZE DAMAGE TO SENISTIVE VEGETATION

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$

NCZ033-049-050-051300-
/O.CON.KGSP.FZ.W.0006.110505T0600Z-110505T1300Z/
AVERY-YANCEY-MITCHELL-
INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE
211 PM EDT WED MAY 4 2011

...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT
THURSDAY...

A FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT
THURSDAY. 

* LOCATIONS...THE NORTHERN MOUNTAINS OF NORTH CAROLINA.

* TEMPERATURES...IN THE LOWER 30S.

* IMPACTS...FREEZE DAMAGE TO SENSITIVE VEGETATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$

GAZ010-NCZ048-053-058-064-065-501-503-505-507-509-051300-
/O.CON.KGSP.FR.Y.0006.110505T0600Z-110505T1300Z/
RABUN-MADISON-BUNCOMBE-GRAHAM-TRANSYLVANIA-HENDERSON-
CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS-
RUTHERFORD MOUNTAINS-POLK MOUNTAINS-
INCLUDING THE CITIES OF...CLAYTON...ASHEVILLE...BREVARD...
HENDERSONVILLE
211 PM EDT WED MAY 4 2011

...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT
THURSDAY...

A FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT
THURSDAY. 

* LOCATIONS...THE CENTRAL AND SOUTHERN MOUNTAINS OF NORTH 
  CAROLINA AND RABUN COUNTY GEORGIA. 

* TEMPERATURES...IN THE MID TO UPPER 30S.

* IMPACTS...FROST DAMAGE TO SENSITIVE VEGETATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$
LG
009 
WWUS72 KGSP 050210
NPWGSP

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1010 PM EDT WED MAY 4 2011

...CHILLY AIRMASS TO OVERSPREAD THE MOUNTAINS...

.COOL HIGH PRESSURE WILL BUILD INTO THE REGION TONIGHT ALLOWING
FOR DIMINISHING WINDS AND CHILLY TEMPERATURES IN THE NORTH
CAROLINA MOUNTAINS.

NCZ033-049>052-059-062-063-051015-
/O.CON.KGSP.FZ.W.0006.110505T0600Z-110505T1300Z/
AVERY-YANCEY-MITCHELL-SWAIN-HAYWOOD-NORTHERN JACKSON-MACON-
SOUTHERN JACKSON-
INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE...BRYSON CITY...
WAYNESVILLE...SYLVA...FRANKLIN
1010 PM EDT WED MAY 4 2011

...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT
THURSDAY...

A FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT
THURSDAY. 

* LOCATIONS...THE NORTHERN MOUNTAINS OF NORTH CAROLINA.

* TEMPERATURES...IN THE MID 30S.

* IMPACTS...FREEZE DAMAGE TO SENSITIVE VEGETATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$

GAZ010-NCZ048-053-058-064-065-501-503-505-507-509-051015-
/O.CON.KGSP.FR.Y.0006.110505T0600Z-110505T1300Z/
RABUN-MADISON-BUNCOMBE-GRAHAM-TRANSYLVANIA-HENDERSON-
CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS-
RUTHERFORD MOUNTAINS-POLK MOUNTAINS-
INCLUDING THE CITIES OF...CLAYTON...ASHEVILLE...BREVARD...
HENDERSONVILLE
1010 PM EDT WED MAY 4 2011

...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT
THURSDAY...

A FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT
THURSDAY. 

* LOCATIONS...THE CENTRAL AND SOUTHERN MOUNTAINS OF NORTH 
  CAROLINA AND RABUN COUNTY GEORGIA. 

* TEMPERATURES...IN THE UPPER 30S.

* IMPACTS...FROST DAMAGE TO SENSITIVE VEGETATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$

14
337 
WWUS72 KGSP 050819
NPWGSP

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
419 AM EDT THU MAY 5 2011

...CHILLY AIRMASS TO REMAIN OVER THE MOUNTAINS...

.COOL HIGH PRESSURE WILL REMAIN OVER THE REGION THIS MORNING
ALLOWING FOR DIMINISHING WINDS AND CHILLY TEMPERATURES IN THE
NORTH CAROLINA MOUNTAINS.

NCZ033-049>052-059-062-063-051300-
/O.CON.KGSP.FZ.W.0006.000000T0000Z-110505T1300Z/
AVERY-YANCEY-MITCHELL-SWAIN-HAYWOOD-NORTHERN JACKSON-MACON-
SOUTHERN JACKSON-
INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE...BRYSON CITY...
WAYNESVILLE...SYLVA...FRANKLIN
419 AM EDT THU MAY 5 2011

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING...

A FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING. 

* LOCATIONS...THE NORTHERN MOUNTAINS AND MOST OF THE MOUNTAINS
  WEST OF THE FRENCH BROAD IN NORTH CAROLINA.

* TEMPERATURES...IN THE LOWER 30S.

* IMPACTS...FREEZE DAMAGE TO SENSITIVE VEGETATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$

GAZ010-NCZ048-053-058-064-065-501-503-505-507-509-051300-
/O.CON.KGSP.FR.Y.0006.000000T0000Z-110505T1300Z/
RABUN-MADISON-BUNCOMBE-GRAHAM-TRANSYLVANIA-HENDERSON-
CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS-
RUTHERFORD MOUNTAINS-POLK MOUNTAINS-
INCLUDING THE CITIES OF...CLAYTON...ASHEVILLE...BREVARD...
HENDERSONVILLE
419 AM EDT THU MAY 5 2011

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING...

A FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING. 

* LOCATIONS...THE FRENCH BROAD VALLEY...THE BLUE RIDGE ESCARPMENT
  AND GRAHAM COUNTY IN NORTH CAROLINA AND RABUN COUNTY GEORGIA.

* TEMPERATURES...IN THE MID 30S.

* IMPACTS...FROST DAMAGE TO SENSITIVE VEGETATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$
425 
WWUS72 KGSP 051251
NPWGSP

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
851 AM EDT THU MAY 5 2011

NCZ033-049>052-059-062-063-051400-
/O.EXP.KGSP.FZ.W.0006.000000T0000Z-110505T1300Z/
AVERY-YANCEY-MITCHELL-SWAIN-HAYWOOD-NORTHERN JACKSON-MACON-
SOUTHERN JACKSON-
INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE...BRYSON CITY...
WAYNESVILLE...SYLVA...FRANKLIN
851 AM EDT THU MAY 5 2011

...FREEZE WARNING WILL EXPIRE AT 9 AM EDT THIS MORNING...

THE FREEZE WARNING WILL EXPIRE AT 9 AM EDT THIS MORNING. 

TEMPERATURES ARE WARMING QUICKLY ACROSS THE AREA THIS MORNING SO
THE WARMING WILL BE ALLOWED TO EXPIRE.

$$

GAZ010-NCZ048-053-058-064-065-501-503-505-507-509-051400-
/O.EXP.KGSP.FR.Y.0006.000000T0000Z-110505T1300Z/
RABUN-MADISON-BUNCOMBE-GRAHAM-TRANSYLVANIA-HENDERSON-
CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS-
RUTHERFORD MOUNTAINS-POLK MOUNTAINS-
INCLUDING THE CITIES OF...CLAYTON...ASHEVILLE...BREVARD...
HENDERSONVILLE
851 AM EDT THU MAY 5 2011

...FROST ADVISORY WILL EXPIRE AT 9 AM EDT THIS MORNING...

THE FROST ADVISORY WILL EXPIRE AT 9 AM EDT THIS MORNING. 

TEMPERATURES ARE WARMING QUICKLY ACROSS THE AREA THIS MORNING SO
THE ADVISORY WILL BE ALLOWED TO EXPIRE.

$$
116 
WWUS72 KGSP 051252 AAA
NPWGSP

URGENT - WEATHER MESSAGE...UPDATED
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
852 AM EDT THU MAY 5 2011

NCZ033-049>052-059-062-063-051400-
/O.EXP.KGSP.FZ.W.0006.000000T0000Z-110505T1300Z/
AVERY-YANCEY-MITCHELL-SWAIN-HAYWOOD-NORTHERN JACKSON-MACON-
SOUTHERN JACKSON-
INCLUDING THE CITIES OF...NEWLAND...SPRUCE PINE...BRYSON CITY...
WAYNESVILLE...SYLVA...FRANKLIN
852 AM EDT THU MAY 5 2011

...FREEZE WARNING WILL EXPIRE AT 9 AM EDT THIS MORNING...

THE FREEZE WARNING WILL EXPIRE AT 9 AM EDT THIS MORNING. 

TEMPERATURES ARE WARMING QUICKLY ACROSS THE AREA THIS MORNING SO
THE WARNING WILL BE ALLOWED TO EXPIRE.

$$

GAZ010-NCZ048-053-058-064-065-501-503-505-507-509-051400-
/O.EXP.KGSP.FR.Y.0006.000000T0000Z-110505T1300Z/
RABUN-MADISON-BUNCOMBE-GRAHAM-TRANSYLVANIA-HENDERSON-
CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS-
RUTHERFORD MOUNTAINS-POLK MOUNTAINS-
INCLUDING THE CITIES OF...CLAYTON...ASHEVILLE...BREVARD...
HENDERSONVILLE
852 AM EDT THU MAY 5 2011

...FROST ADVISORY WILL EXPIRE AT 9 AM EDT THIS MORNING...

THE FROST ADVISORY WILL EXPIRE AT 9 AM EDT THIS MORNING. 

TEMPERATURES ARE WARMING QUICKLY ACROSS THE AREA THIS MORNING SO
THE ADVISORY WILL BE ALLOWED TO EXPIRE.

$$

What forecasters said that day

The local office's own words before this frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this frost advisory went out at May 4, 4:07 AM EDT, 10 minutes earlier.

Area forecast discussion, May 4, 4:07 AM EDT, 10 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
407 AM EDT WED MAY 4 2011

.SYNOPSIS...
AN AREA OF BROAD HIGH PRESSURE WILL BUILD OVER THE REGION TODAY AND
LINGER THROUGH THURSDAY. A FAST MOVING UPPER LEVEL DISTURBANCE WILL
THEN MOVE OVER THE NORTH CAROLINA MOUNTAINS ON FRIDAY FOLLOWED BY
ANOTHER SURFACE HIGH BUILDING BACK OVER THE ARE ON SATURDAY AND
REMAINING IN PLACE THROUGH THE WEEKEND.

&&

.NEAR TERM /THROUGH THURSDAY/...
LAST ROUND OF SHOWERS MOVING OUT OF THE FOOTHILLS INTO THE PIEDMONT
OVER NC AND INTO THE ERN UPSTATE OVER SC. THESE SHOWERS SHOULD BE
EAST OF I-77 BY DAYBREAK THEN OUT OF THE CWFA SHORTLY THEREAFTER.
EXPECT SOME TEMPO GUSTY WINDS THRU THEN AS WELL.

UPPER TROF AXIS MOVES OVER THE AREA TODAY AS A CHANNELED SHORT WAVE
ROTATES AROUND THE BASE OF THE TROF. THE BEST DPVA...AND CENTER OF
THE MID LEVEL COLD POOL...WILL BE TO OUR NORTH. HOWEVER...ENUF LOW
LEVEL MOISTURE WILL MOVE OUT OF THE MTNS FOR A FEW SHOWERS TO
DEVELOP IN THE WEAK FORCING AND INSTABILITY THAT WILL DEVELOP. THESE
SHOWERS SHOULD BE LIMITED TO THE NRN MTNS AND THE I-40 CORRIDOR.
THAT SAID...THERE SHOULD BE QUITE A BIT OF CLOUDS THAT DEVELOP OVER
THE FOOTHILLS AND PIEDMONT OF NC AND THE ERN UPSTATE WHERE THE
MOISTURE WILL BE HIGHEST. BREEZY WINDS WILL DEVELOP OVER THE MTNS
WITH SOME LOW END GUSTS POSSIBLE OUTSIDE OF THE MTNS AS DEEPER
MIXING DEVELOPS NEAR NOON. HIGHS SHOULD BE NEARLY 10 DEGREES BELOW
NORMAL ACROSS NC  AND THE ERN UPSTATE WHERE LOWER THICKNESSES AND
MORE CLOUDS DEVELOP WITH HIGHS AROUND 5 DEGREES BELOW NORMAL NE
GA/WRN UPSTATE.

TROF AXIS MOVES EAST OF THE AREA TONIGHT AND CENTER OF SFC HIGH
PRESSURE DROPS TOWARD THE AREA. SKIES WILL CLEAR AND WINDS DIMINISH
AS GRADIENT RELAXES OVER THE CWFA. ALTHOUGH RADIATIONAL CONDITIONS
WILL NOT BE THE BEST...THEY SHOULD BE DECENT. LOWS SHOULD END UP
AROUND 10 DEGREES BELOW NORMAL...EXCEPT NEARLY 15 DEGREES BELOW
NORMAL NC PIEDMONT. THIS SHOULD BE COLD ENUF FOR WIDESPREAD FREEZING
TEMPS OVER THE NRN MTNS AND OVER THE HIGHER ELEVATIONS OF THE
SMOKIES AND BALSAMS. WILL FOLLOW TRENDS OF THE PREVIOUS FCST AND GO
WITH FREEZE FOR THE NRN MTNS ONLY SINCE IT IS MAINLY THE HIGHER
ELEVATIONS ELSEWHERE. WILL GO WITH A FROST ADV FOR THE REST OF THE
NC MTNS AND RABUN CO GA AND PATCHY FROST SC MTNS...HABERSHAM CO GA
AND THE LOWER ELEVATIONS OF THE NC FOOTHILLS.

&&

.SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY/...
AS OF 245 AM WEDNESDAY MORNING...THE SHORT TERM FCST PICKS UP AT 12Z
ON THURSDAY WITH THE CLOSED H5 LOW ROTATING OFF THE NEW ENGLAND
COAST AND AN UPPER RIDGE AXIS BUILDING OVER THE CAROLINAS. A WELL
DEFINED UPPER SHORTWAVE WILL APPROACH THE CWFA EARLY FRI AND MOVE
OVER THE AREA DURING THE DAY/EVENING WITH ZONAL UPPER FLOW
REESTABLISHING ITSELF BY THE END OF THE PERIOD EARLY SAT. SFC HIGH
PRESSURE CENTERED JUST TO OUR NW WILL KEEP CLEAR SKIES AND LIGHT
WINDS OVER THE REGION ON THURS WITH HIGH TEMPS REBOUNDING SLIGHTLY
TO JUST BELOW CLIMATOLOGY. TEMPS WOULD BE EXPECTED TO REBOUND
MORE...YET LINGERING NORTHERLY FLOW WILL KEEP THICKNESSES FROM
RISING SIGNIFICANTLY ON THURS. AS THE SFC HIGH SLIDES OFFSHORE ON
FRI AND THE UPPER SHORTWAVE APPROACHES...A LIMITED AMOUNT OF LOW/MID
LVL MOISTURE COULD GENERATE LIMITED PRECIP OVER THE NC MTS AND
FOOTHILLS...HOWEVER BY EARLY SAT UPPER SUPPORT IS EXPECTED TO
DWINDLE AND LOW LVL FLOW WILL BECOME MORE DOWNSLOPE. LATEST MODEL
SOUNDINGS GENERATE SOME SMALL AMOUNTS OF SFC BASED CAPE OVER THE
SAME AREA SO SOME ISO TO SCT THUNDER IS POSSIBLE...BUT THAT SHOULD
BE ABOUT IT. TEMPS STEADILY CLIMB ON FRI AND SAT WITH HIGHS NEAR 80
ANTICIPATED FOR THE PIEDMONT AND FOOTHILLS.

&&

.LONG TERM /SATURDAY NIGHT THROUGH TUESDAY/...
AS OF 3 AM WEDNESDAY MORNING...THE MEDIUM RANGE FCST BEGINS AT 12Z
ON SATURDAY WITH RELATIVELY FLAT UPPER FLOW OVER THE AREA AND SOME
WEAK H5 SHORTWAVE ENERGY TO OUR NW. LONG RANGE OP MODELS AGREE THAT
BEGINNING EARLY NEXT WEEK HEIGHTS WILL STEADILY RISE AS ANOTHER
UPPER RIDGE BUILDS OVER THE SE CONUS AND A DEEP UPPER TROF DIGS DOWN
OVER THE ROCKIES. AT THE SFC...HIGH PRESSURE WILL BE IN CONTROL OF
THE SENSIBLE WX FOR THE FIRST PART OF THE WEEKEND. AS THE HIGH MOVES
FARTHER EAST ON SUN...A STALLED SFC BOUNDARY WILL SET UP TO OUR
NORTH OVER THE OHIO RIVER VALLEY AND LINGER THRU MON. WEAK SOUTH TO
SW LOW LVL FLOW WILL PERSIST OVER THE FCST AREA FOR MUCH OF THE
PERIOD WITH WINDS BECOMING LIGHT AND VARIABLE AT TIMES. NO MAJOR
CHANGE WRT THE SFC SYNOPTIC PATTERN IS ANTICIPATED UNTIL BEYOND DAY
7 WHEN THE NEXT SIGNIFICANT FRONTAL SYSTEM APPROACHES. THE BEST
CHANCE FOR PRECIP WILL LIKELY BE SUN AFTERNOON/EVENING AS BOTH THE
GFS AND ECMWF GENERATE A PLUME OF HIGHER RH VALUES OVER THE NORTHERN
PORTION OF OUR CWFA. BEYOND THAT...I INCLUDED JUST A SLIGHT CHANCE
POP FOR THE NC MTS AND PORTIONS OF THE FOOTHILLS TO ACCOUNT FOR THE
POTENTIAL FOR SCATTERED SH/TS ASSOCIATED WITH WEAK UPSLOPE FLOW EACH
DAY. TEMPS WERE NOT MODIFIED MUCH AND SHOULD REMAIN WELL ABOVE CLIMO
WITH HIGHS IN THE LOW TO MID 80S FOR THE LOWER ELEVATIONS AND MID TO
UPPER 70S FOR THE MTS.

&&

.AVIATION /08Z WEDNESDAY THROUGH SUNDAY/...
AT KCLT...COLD FRONT HAS MOVED EAST OF THE AREA BUT POST FRONTAL
PRECIP WILL CONTINUE THRU DAYBREAK. EXPECT WINDS ON EITHER SIDE OF
NORTH THRU DAYBREAK AS WELL. RESTRICTIONS WILL BE LIMITED TO SHOWERS
MOVING OVER THE AIRFIELD. LOW VFR WILL SCATTER OUT AROUND DAYBREAK
AS DRIER AIR MOVES IN. LOW LEVEL MOISTURE WILL MOVE BACK IN OVER THE
AREA ON NWLY FLOW LIKELY PRODUCING A HIGH BASED CU CIG FOR THE
AFTERNOON. SKIES CLEAR AGAIN DURING THE EVENING WITH NLY WINDS
RETURNING.

ELSEWHERE...SIMILAR TRENDS AS KCLT. SHOWERS OVER THE AREA MOVE EAST
BY DAYBREAK WITH RESTRICTIONS LIMITED TO SHOWERS MOVING OVER THE AIR
FIELD. KAVL THE EXCEPTION WHERE MVFR CIGS WILL LINGER UNTIL
DAYBREAK. WINDS WILL BE NW TO N...XCPT WLY EARLY AT KAND AND GUSTY
AT KAVL...EARLY THIS MORNING. WINDS BECOME W TO NW AS LEE TROF
DEVELOPS DURING THE DAY...EXCEPT CONTINUED NLY AT KAVL. LOW LEVEL
MOISTURE MOVES OUT OF THE MTNS AND ACROSS THE AREA DURING THE DAY.
HEATING AND COOLER MID LEVEL AIR WILL PRODUCE CLOUDS OVER MOST OF
THE AREA WITH ISOLATED SHRA POSSIBLE AT KHKY. SKIES CLEAR DURING THE
EVENING WITH NLY WINDS RETURNING.

OUTLOOK...A CLIPPER SYSTEM WILL BRUSH THE AREA ON FRIDAY BEFORE
HIGH PRES RETURNS AGAIN OVER THE WEEKEND. CONDITIONS SHOULD STAY VFR.

&&

.GSP WATCHES/WARNINGS/ADVISORIES...
GA...FROST ADVISORY FROM 2 AM TO 9 AM EDT THURSDAY FOR GAZ010.
NC...FROST ADVISORY FROM 2 AM TO 9 AM EDT THURSDAY FOR NCZ048-
     051>053-058-059-062>065-501-503-505-507-509.
     FREEZE WARNING FROM 2 AM TO 9 AM EDT THURSDAY FOR NCZ033-049-
     050.
SC...NONE.

&&

SYNOPSIS...JPT
NEAR TERM...RWH
SHORT TERM...JPT
LONG TERM...JPT
AVIATION...RWH
Hazardous weather outlook, May 3, 4:26 PM EDT, 11 hours 51 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
426 PM EDT TUE MAY 3 2011

NCZ048-052-053-059-062>065-042030-
MADISON-HAYWOOD-BUNCOMBE-NORTHERN JACKSON-MACON-SOUTHERN JACKSON-
TRANSYLVANIA-HENDERSON-
426 PM EDT TUE MAY 3 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...TONIGHT.

THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE INTO THIS
EVENING...AND A FEW OF THESE STORMS WILL HAVE THE POTENTIAL TO
BECOME SEVERE...WITH LARGE HAIL AND DAMAGING WIND GUSTS BEING THE
MAIN THREATS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

A CHILLY AIRMASS WILL OVERSPREAD THE REGION...GIVING RISE TO THE
POSSIBILITY OF A LIGHT FREEZE ACROSS THE MOUNTAINS EARLY THURSDAY
MORNING...ESPECIALLY ACROSS THE HIGHER ELEVATIONS. FROST WILL ALSO
BE POSSIBLE IN SHELTERED VALLEYS.

.SPOTTER INFORMATION STATEMENT...

NONE.

NCZ033-049-050-042030-
AVERY-YANCEY-MITCHELL-
426 PM EDT TUE MAY 3 2011

...FREEZE WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY
MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...TONIGHT.

THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE INTO THIS
EVENING...AND A FEW OF THESE STORMS WILL HAVE THE POTENTIAL TO
BECOME SEVERE...WITH LARGE HAIL AND DAMAGING WIND GUSTS BEING THE
MAIN THREATS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FREEZE WATCH.

A CHILLY AIRMASS WILL OVERSPREAD THE REGION...GIVING RISE TO THE
POSSIBILITY OF A LIGHT FREEZE ACROSS THE MOUNTAINS EARLY THURSDAY
MORNING. FROST WILL ALSO BE POSSIBLE IN SHELTERED VALLEYS.

.SPOTTER INFORMATION STATEMENT...

NONE.

GAZ010-017-018-026-028-029-NCZ035>037-056-057-068>072-082-501>510-
SCZ001>014-019-042030-
RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-ALEXANDER-IREDELL-
DAVIE-CATAWBA-ROWAN-CLEVELAND-LINCOLN-GASTON-MECKLENBURG-CABARRUS-
UNION NC-CALDWELL MOUNTAINS-GREATER CALDWELL-BURKE MOUNTAINS-
GREATER BURKE-MCDOWELL MOUNTAINS-EASTERN MCDOWELL-
RUTHERFORD MOUNTAINS-GREATER RUTHERFORD-POLK MOUNTAINS-EASTERN POLK-
OCONEE MOUNTAINS-PICKENS MOUNTAINS-GREENVILLE MOUNTAINS-
GREATER OCONEE-GREATER PICKENS-GREATER GREENVILLE-SPARTANBURG-
CHEROKEE-YORK-ANDERSON-ABBEVILLE-LAURENS-UNION SC-CHESTER-GREENWOOD-
426 PM EDT TUE MAY 3 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT
NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA.

.DAY ONE...TONIGHT.

THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE INTO THIS
EVENING...AND A FEW OF THESE STORMS WILL HAVE THE POTENTIAL TO
BECOME SEVERE...WITH LARGE HAIL AND DAMAGING WIND GUSTS BEING THE
MAIN THREATS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

NONE.

NCZ051-058-042030-
SWAIN-GRAHAM-
426 PM EDT TUE MAY 3 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

A CHILLY AIRMASS WILL OVERSPREAD THE REGION...GIVING RISE TO THE
POSSIBILITY OF A LIGHT FREEZE ACROSS THE MOUNTAINS EARLY THURSDAY
MORNING...ESPECIALLY ACROSS THE HIGHER ELEVATIONS. FROST WILL ALSO
BE POSSIBLE IN SHELTERED VALLEYS.

.SPOTTER INFORMATION STATEMENT...

NONE.

In the hours before

Special weather statement, May 3, 10:38 PM EDT, 5 hours 39 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1038 PM EDT TUE MAY 3 2011

NCZ037-057-040330-
DAVIE-ROWAN-
1038 PM EDT TUE MAY 3 2011

...A STRONG THUNDERSTORM WILL AFFECT DAVIE AND NORTHERN ROWAN
COUNTIES THROUGH 1130 PM EDT...

AT 1035 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR COOLEEMEE...OR 5 MILES SOUTH OF
MOCKSVILLE...MOVING NORTHEAST AT 50 MPH.

THIS STORM WILL BE NEAR...
  MOCKSVILLE...
  FARMINGTON...
  ADVANCE...

WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THIS STORM.

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY
ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.

LAT...LON 3557 8074 3569 8077 3606 8060 3605 8049
      3607 8046 3601 8041 3599 8041 3593 8036
      3589 8036 3588 8041 3585 8038 3582 8047
      3574 8045 3573 8034 3568 8033 3560 8023

ARK
Local storm report, May 3, 10:44 PM EDT, 5 hours 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1044 PM EDT TUE MAY 03 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0952 PM     TSTM WND DMG     1 NE CLOVER             35.12N 81.21W
05/03/2011                   YORK               SC   FIRE DEPT/RESCUE

            FIRE DEPARTMENT REPORTED ONE TREE DOWN ON THE NORTHEAST
            SIDE OF CLOVER.

&&

OUTLAW
Special weather statement, May 3, 11:13 PM EDT, 5 hours 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1113 PM EDT TUE MAY 3 2011

NCZ057-072-082-040345-
CABARRUS-ROWAN-UNION-
1113 PM EDT TUE MAY 3 2011

...STRONG THUNDERSTORMS WILL AFFECT EASTERN CABARRUS...EASTERN UNION
AND SOUTHEASTERN ROWAN COUNTIES THROUGH 1145 PM EDT...

AT 1108 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 3 MILES NORTH OF
GOLD HILL TO 4 MILES SOUTHWEST OF TRINITY...MOVING EAST AT 45 MPH.

THESE STORMS WILL BE NEAR...
  WINGATE...
  MARSHVILLE...
  STURDIVANTS...

WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS.

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY
ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.

LAT...LON 3550 8030 3519 8050 3517 8044 3518 8037
      3517 8035 3520 8029 3519 8027 3482 8031
      3481 8064 3565 8037 3566 8030 3558 8020
      3550 8018

ARK

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 3, 8:11 PM EDTSevere Thunderstorm WarningGSPAlexander, Catawba, Davie, Iredell, Rowan64 min
May 3, 9:16 PM EDTSpecial Weather StatementGSPGaston44 min
May 3, 9:40 PM EDTSevere Thunderstorm WarningGSPCleveland, Gaston, Lincoln, Mecklenburg48 min
May 3, 10:16 PM EDTSevere Thunderstorm WarningGSPCabarrus, Iredell, Mecklenburg, Rowan, Union59 min
May 3, 10:38 PM EDTSpecial Weather StatementGSPDavie, Rowan52 min
May 3, 11:13 PM EDTSpecial Weather StatementGSPUnion32 min
May 4, 4:17 AM EDTFreeze WarningGSPAvery, Haywood, Jackson, Macon, Mitchell, Swain and 1 more29 hr

Nearby

Frost Advisories in North Carolina, 2011Frost Advisories in Georgia, 2011Every frost advisory in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.